dyn@ng virtual lab -...
TRANSCRIPT
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Dyn@NG Virtual Lab
Fulvio Risso, Politecnico di Torino, Italy
http://fulvio.frisso.net/
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Teaching networks in the old days
Real hardware, real networks
Limited number of routers
Sharing lab among different users
Using different topologies
Low-level issues (e.g., faulty cables)
Generation of real traffic
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Next step: going virtual
Virtual hardware, real networks
Multiple topologies
Scalability issues (CPU power)
Need Cisco IOS
Need specific software (GNS-3, Dynamips)
Generation of real traffic
dynamips
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Our solution: the Dyn@NG Virtual Lab
dynamips
Virtual hardware, real networks
Multiple topologies
Scalable (no CPU power issues)
No Cisco IOS needed (for clients)
Web 2.0 (no specific software needed)
Generation of real traffic
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Dyn@NG screenshot
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How it works (1)
dynamips1
dynamips2
dynamips3
Dyn@NG Supervisor
Web server
Mgm daemons (MySQL, packet
capture, data cleanup)
User clients Server farm
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How it works (2)
• GUI on the client side (Javascript)
• User connects to the Dyn@NG web portal for
– Sync the local config with the Dyn@NG supervisor
– Interact with routers (router consoles get “proxied” through the web server)
• Dynamips ports and parameters are handled by the supervisor
– Completely transparent to the user
• Supervisor also handles cleanup, zombie sessions
– Dynamips instances are cleared up when the user disconnects
dynamips1
dynamips2
dynamips3
Dyn@NG Supervisor
Web server
Mgm daemons (MySQL, packet capture,
data cleanup)
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Can do and cannot do
• Learning how to do with
router OS features
• Practice with OS commands
• Practice with network devices
– Several supported devices
(e.g., Cisco 2600, 3600,
3700, 7200, …)
• Play with different OS images
– Can offer a wide set of OS
images
• Capture real traffic
• Evaluate routers performance
• Simulate all aspects of a real
network
• Play with all types of network
devices (datacenter devices,
catalyst switches, …)
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How to use Dyn@NG
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Main steps
1. Register on Dyn@NG
– http://dynng.ipv6.polito.it
2. Check what you have to do
– E.g., download the homework from the course web site
3. Create the topology on Dyn@NG (or) import a topology file
if this is available on the course website
4. Configure the routers (see later)
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Dyn@NG: user registration
Registration available only from selected domains
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The main window
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Configuring the network devices
• Complete the setup of the topology
– E.g., routers (with the proper linecards), links
• Start the network (i.e., launch the route virtualization
environment)
– Menu: network / start
• Open the consoles of the router
– Click on the terminal icon, on the bottom of the screen
– Configure the routers
• To capture traffic, select the proper link (or all) on the
rightmost window and select "start capture"
– Captured packets can be either shown in Dyn@NG or
downloaded as a dump file and visualized with Wireshark
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The main window (running)
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For any questions...
• Contacts
– Fulvio Risso
• Credits
– Niccolò Cascarano
– Marco Leogrande
– Daniele Aramu